At 172cm the healthy range is 54.7 to 73.7kg. One kilogram moves BMI by 0.34 of a point at this height — the general rule being one divided by height in metres squared. So a whole point of BMI is about three kilograms, and the entire healthy window of 18.9kg is a little over six points wide. That is a useful sense of..
= 5ft 7.7in
YOUR RESULTS
BODY MASS INDEX
23.7
Normal weight
BMI PRIME
0.95
Normal = 0.74–1.00
PONDERAL INDEX
13.8
kg/m³
HEALTHY WEIGHT RANGE
54.7 – 73.7 kg
Within the healthy weight range. Maintain with balanced diet and regular exercise.
BMI GAUGE
YOUR POSITION
FULL SUMMARY
WHO BMI CATEGORIES
The height is already set to 172cm, which is about 5 ft 8 in. Change it if that is not yours and everything below recalculates.
Enter a weight in kilograms. Switching to imperial converts the height to the nearest inch, which is a coarser step — two adjacent even centimetre values can land on the same one.
Read the range before the category. At this height it spans 18.9kg, and every weight inside produces the same verdict.
Treat a reading near a boundary as near a boundary. One kilogram is 0.34 of a point here, and most people vary by more than that across a day.
At 172cm — 1.72m, or about 5 ft 8 in — a BMI of 18.5 puts the lower bound at 54.7kg and a BMI of 24.9 puts the upper bound at 73.7kg. The window is 18.9kg, or about 42 pounds. One kilogram moves the number by 0.34 of a point, so it takes roughly 3.0kg to cross a whole one. On the WHO 2004 cut-offs for South and East Asian populations the upper bound drops to 67.7kg, a reduction of 5.9kg, with the lower bound unchanged.
FORMULA REFERENCE TABLE
| Name | Formula | Description |
|---|---|---|
| BMI (Metric) | BMI = weight(kg) / height(m)² | Divide weight in kg by height in metres squared |
| BMI (Imperial) | BMI = 703 × weight(lbs) / height(in)² | Multiply weight in pounds by 703, divide by height in inches squared |
| Height in metres | h(m) = h(cm) / 100 | Convert centimetres to metres before squaring |
| BMI Prime | BMI Prime = BMI / 25 | Ratio of BMI to upper limit of normal (25). Values >1.00 indicate overweight |
| Ponderal Index | PI = weight(kg) / height(m)³ | More accurate than BMI for very tall or short individuals. Normal: 11–15 kg/m³ |
| Healthy weight | w = BMI × height(m)² | Rearranged BMI formula: weight(kg) for any target BMI at your height |
Ideal Body Weight Calculator
Calculate instantly →
Body Fat Percentage Calculator
Calculate instantly →
BMI Calculator for Men
Calculate instantly →
BMI Calculator for 184cm Height
Calculate instantly →
BMI for Age Calculator (Children)
Calculate instantly →
Waist-to-Hip Ratio Calculator
Calculate instantly →
Waist-to-Height Ratio Calculator
Calculate instantly →
Lean Body Mass Calculator
Calculate instantly →
Healthy Weight Range Calculator
Calculate instantly →
BMI Calculator for Women
Calculate instantly →
BMI Calculator for 5 ft 0 in
Calculate instantly →
BMI Calculator for 5 ft 1 in
Calculate instantly →
BMI Calculator for 5 ft 2 in
Calculate instantly →
BMI Calculator for 5 ft 3 in
Calculate instantly →
BMI Calculator for 5 ft 4 in
Calculate instantly →
BMI Calculator for 5 ft 5 in
Calculate instantly →
BMI Calculator for 5 ft 6 in
Calculate instantly →
BMI Calculator for 5 ft 7 in
Calculate instantly →
BMI Calculator for 5 ft 8 in
Calculate instantly →
BMI Calculator
Calculate instantly →
Last updated: August 2, 2026 · Formula verified by EagleCalculator team · Source: WHO Global Database on Body Mass Index · Eagle-eyed accuracy for every calculation.